Centrifugal governor



Nov. so, 1948. L.'DE MARCO 2,454,913

CENTRIFUGAL GOVERNOR Filed Sept. 27, 1944 3 Sheets-Sheet 1 I N VEN TOR.

5 LOUA5 DEM4ECO fiv-razewsys Nov. 30, 1948.

L. DE MARCO CENTRIFUGAL GOVERNOR 5 Shets-Sheet 2 Filed Sept 27, 1944 km s 2 H WM m m w 7 Nov. "30, 1948. 1.. DE MARo 2,454,913

GENTRIFUGAL GOVERNOR 4 v Filedse t. 27, 1944 s Sheets-Sheet s IN VEN TOR. 100/5 DEM/M960 A True/YE Y5 drawings, turning the arms 3| and 33 clockwise, as viewed in Fig. 3, and exerting a push on the control rod 35, that is after centrifugal force acting upon the weights is sufficient to cause spring 36 to yield. As the speed increases, the weights I8 move further outward, but their centers of gravity never quite reach the plane through the axes of pins H. In other words, the weights -a'lways exert leverage tending to move sleeve 22 upwardly, as viewed in the drawings, although they are so disposed and mounted that their leverage decreases from low speed to high speed. However, even with this decreased leverage these weights alone would exert relatively great force at higher speeds, and a-verystrong spring 36 would be requiredto oppose such force.

The position of weights 24, when the governor is stationary, is shown in broken lines in-Fig, 3. Their centers of mass are then above the plane through the axes of pins 23. As the shaft 14 be gins to rotate and its speed increases, weights 24 at first swing outward until their centers of gravity lie in the plane of .the axes of pins 23. .During, this time the effect of these auxiliary weights is added to that of the primary weights is for raising the sleeve 22 against the action of spring 36, thereby obtaining movement of control rod 35 in the low speed range. As soon as the centers of mass of weights 24 reach their outermost position however, this additive effect ceases. For any increase inspeed beyond that point the Weights 24 swing inwardly because of their connection with sleeve 22, whichin turnjis raised by the heavier weights is. Centrifugal force acting upon weights 24 throughout the higher speed range is therefore in effect subtracted from the force acting upon weights [8. It will be noted also that the leverage exerted by the weights 24 increases as the range of the governor, the second set of weights being mounted to move to their outermost position at a given speed for augmenting the effect of the first set and being adapted thereafter at higher speeds to be moved inward by said sleeve for opposing the effect of the first set.

3. In a centrifugal governor, a shaft, control means movable axially relative to said shaft, a set of weights mounted to turn with the shaft and to swing on parallel axes under the influence of centrifugal force for moving said control means in one axial direction under speed increases throughout the range of the governor, a second set of weights mounted independently of the first set to turn with the shaft and to swing on parallel axes separate from said first named axes and functioning at low speeds to augment the action of the first set, but adapted to be forced inward by the control means at higher speeds for opposing by centrifugal force the effect of the first set, said first set having decreasing leverage from minimum to maximum speed and said second set having increasing leverage from intermediate to maximum the speed increases, and thus their effect in opmrespondingly long.

The secondary set of weights are mounted independently of the primary set, that is to say they are mounted to turn upon axes that are different from the axes of the primary set. Because of this independent mounting itis possible to build governors for special jobs with a minimum number of new parts. In most cases one pair of weights of the necessary mass may be designed along with levers of a required length and angularity, while for the other set a pair of weights and levers of sta a d des n ay be utilized. This combination gives fiexibilityand great range ofapplication with a minimum of expense.

Having thus described my invention, I claim:

1. In a centrifugal governor, a shaft, control means movable axially relative to said shaft, a set of weights mounted to turn with the shaft and to swing on parallel axes under the influence of centrifugal forcefor moving said control means in one axial direction unders peed increases throughout the range of the governor, a second set of weights mounted independently of the first setto turn with the shaft and to swing on parallel axes separate from said first named axes and functioning at low speeds to augment the action of the speed. I

4. In a centrifugal governor, a shaft, bracket means secured thereto, a sleeve slidable on said shaft, a primary set of weights pivotally mounted on said bracket means and operatively connected with said sleeve for moving the latter in one direction under speed increases throughout the range of the g=overnor,-an auxiliary set of Weights, pivotal mountings therefor on said bracket means separate from the mountings for said primary set, and operatively connected with said sleeve, said auxiliary set being arranged to reach its outermost position at a relatively low speed and theree after to be swung inwardly by sleeve movement for opposing through centrifugal force and leverage the effect of the first set.

5. In a centrifugal governor, a shaft, contro means movable axially relative to said shaft, a set of weights mounted to turn with the shaft and to swing on parallel axes under the influence of centrifugal force for moving said control means in one axial direction under speed increases throughout the range of the governor, a second set of weights mounted independently of the first set to turn with the shaft and to swing on parallel axes at right angles to the said first named axes, said second set of weights functioning at low speeds to augment the action of the first set but adapted to be forced inward by said control meansat higher speeds for opposing by centrifugal force the effect of the first set.

6. In a centrifugal governor, a shaft, bracket and sleeve members surrounding said shaft, one of said members being rotatable with said shaft and carrying two pairs of parallel pivots disposed in planes at right angles to said shaft, the pivots of one pair being at right angles to those of theother pair, a first pair of weighted levers carried on one pair of pivots, a second pair of weighted levers carried on the other pair of pivots, the inner ends of all said levers having pivotal connection with the other of said members, the pivots, pivotal connections and masses of said weighted levers being so disposed that increases of speed cause said first pair of levers to exert force throughout the range of the governor tending to separate said members axially and cause said second pair of levers to exert force in the higher speed range of the governor opposing the separation of said members.

LOUIS DE MARCO.

REFERENCES CITED The following references are of record in the file of this patent: 

